Question 26/I - New international telecommunication services
(expansion and continuation of Question 3/II,
1985-1988)

Considering

(a) that experience gained from early provision of services gives a
valuable insight into additional services and features that may be
required;

(b) that user requirements and/or expectations of the ISDN may not be
fully satisfied by the currently agreed services;

(c) that the overheads on providing new services may impact on the
marketability of the services;

(d) that dedicated networks and non-ISDN customers will exist for many
years to come and they may reasonably expect new services to
become available. New non-ISDN service requirements are therefore
developing in parallel with ISDN services;

(e) that to facilitate transfer of users from the PSTN to the ISDN, non-
ISDN services may need to conform, whenever possible, to the ISDN
services,

proposes the question:

What new Recommendations and changes to the existing
Recommendations for both ISDN and non-ISDN services are required
and what new services should be specified?

Note 1 - Study of this Question will require close liaison with other
Study
Groups.

Note 2 - Finalization of existing stage 1 service descriptions requires
further work and includes the changes resulting from the iterative
process as other Study Groups complete their stages 2 and 3 work.

Note 3 - Identification of new basic and supplementary services should
take account of current and future market demands and the
capabilities of the network.

Note 4 - To identify the requirement for and specify any changes
needed to existing Recommendations to allow interworking with data
and mobile networks.

Note 5 - Preparation of complete stage 1 service descriptions for new
services is part of the work under this Question.

Note 6 - The scope of this Question will provide the authority to amend
existing Recommendations on, for example: stage 1 description format,
general items such as the definition of busy in an ISDN, Terminal
Compatibility issues, etc.

Note 7 - Guidance should be prepared for other Study Groups as to the
association of supplementary services with basic services.

Note 8 - The term "service" throughout this paper has been used to
cover Bearer Services, Teleservices and their associated
supplementary services/facilities.

Introductory note to Questions 27/I to 32/I

Relationships among draft Questions 27/I to 32/I (Human Factors)

a) Introduction

When the Questions regarding human factors for study during the
period 1989-1992 were defined, it was necessary to compromise
between absolutely sharp borders between the Questions for one thing
and an attempt to reach a reasonably equal distribution of work-load on
the different Rapporteurs for another thing. The intercession with this
contribution is to give some guidelines regarding what Questions new
contributions should be addressed, and also some practical rules to the
sharing of work-load between the different Rapporteurs and their
eventual ad hoc Groups.

b) Question borderlines

Questions 27/I and 32/I are to be seen as umbrella Questions to cover
all PSTN and ISDN services ranging from those already in existence to
those proposed for introduction at some time in the future. For the sake
of distinguishing between Questions 27/I and 32/I, it has been decided
that Question 27/I should deal with services already existing in the
network (on a field trial basis or small dedicated networks) whilst
Question 32/I will deal with services as yet to be introduced.

In practice, the Rapporteurs for Questions 27/I and 32/I will
continuously
coordinate distribution of the work, and Working Party meetings will be
organized so that simultaneous meetings of Questions 27 and 32 will be
avoided wherever possible.

Questions 28/I to 31/I should be regarded as dealing with detailed
elements of the services considered by Questions 27/I and 32/I.